I'm trying to build up some skills in lexing/parsing grammars. I'm looking back on a simple parser I wrote for SQL, and I'm not altogether happy with it -- it seems like there should have been an easier way to write the parser. SQL tripped me up because it has a lot of optional tokens and repitition. For example: SELECT * FROM t1 INNER...
If I generate a parser using FSYacc will it be thread safe? The only reason I ask is because the functions Parsing.rhs_start_pos and Parsing.symbol_end_pos don't appear to have any state passed into them, which would lead me to assume that they are getting the current NonTerminal/Symbols from a shared location, is this correct? Afte...
I am attempting to lex javascript regular exression literals. These start with a "/" and end with a "/" (and sometimes some other modifiers). The issue is that the only way to determine whether it is a regular expression as opposed to a division operator is by reading the tokens previous to the "/" character. One can read a little mor...
I'm learning F# because I'd like to write a lexer and parser. I have a tiny bit of experience with this sort of processing but really need to learn it properly as well as F#. When learning the lexing/parsing functionality of F#, is studying lex and yacc sufficient? Or are there some differences that means code for lex/yacc will not wor...
In namespace RSLispV3.RunTime: http://pastebin.com/XNb9qi11 LispParser.fsy: http://pastebin.com/pymF1Vvm LispLexer.fsl: http://pastebin.com/pfXdDuxs I got in MSBuild the PowerPacks targets, calling them from the .fsprog. When building with VS2008 I get error: "fslex.exe" exited with code 1. Help? ...
I am trying to compile this project: http://ramon.org.il/Here.zip But I get a bunch of non-sense errors. They got text I am familiar with, but in the position there is nothing like that (like unexpected ')' at an empty row). Help me, please! ...
Hi, In the lack of any good free XPath 2.0 implementations for .Net build upon Linq to XML I have thought about implementing my own (also for the experience). But just to be clear (and not building something that exists) these are the XPath 2.0 implementations I have found: Saxon .Net Query Machine - I had problems with this - excepti...
I am trying to implement a library with extended parsing capabilities. I decided that I will use fsyacc because I knew it from the university. Unfortunately I encountered following problem. I defined a class for the head of my grammar (Head) and place its implementation in a single file. Then I defined parser as: ... %start head %type...